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Old 05-16-2010, 11:56 PM
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SBC Comp Cams valve spring, pushrod, break-in questions

I am building a sbc which I will be installing a Comp Cams XE262 cam in. I bought the kit that includes the cam, lifters, valve springs, valve seals, and timing chain. The kit came with single valve springs. The World Products SR torquer heads that I am using have dual springs on them. Are the springs that came in the kit intended to replace my current outer springs while reusing the old inner spring. I have read that I should remove the inner spring for break-in, correct? Is installing the Comp Cam springs and seals something that I can do at home with a simple valve spring compressor? Finally, I had my block zero decked to a set of speed pro flat top pistons. I am going to be using a .039 thick head gasket and stock rocker arms, will stock length pushrods work with this setup?

Thanks,

Derek

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Old 05-17-2010, 01:38 AM
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You don`t reuse old springs, you only use the springs that came with the cam. The cam you have is on the small side and won`t require a weaker spring to do break in procedure. Cam break in with weaker springs is only needed when your sure enough trying to break in a cam that`s huge and has mammoth sized springs on it. What happens is, the spring pressure on heavy duty springs is so high, it forces the oil wedge off the cam which ruins it.
Since the block is zero decked, your going to have to check valve train geometry after it`s assembled to know what lenth push rods to get.
If it were I, I would use a .041 thickness gasket with a zero deck.
After you get your valve train set up, make sure you break it in with lube that has ZDDP in it or the cam will go flat. The Valvoline race oil has it and works well for cam break in. You`ll have to keep using it there after to make sure the cam survives.
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Old 05-17-2010, 06:10 AM
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Quote:
Originally Posted by dlisabeth
The World Products SR torquer heads that I am using have dual springs on them.
No telling what they are, actually- w/o having them checked for pressure. According to SUMMIT, the S/R Torquers come w/single springs, no damper, w/lift good to 0.560".

Quote:
Are the springs that came in the kit intended to replace my current outer springs while reusing the old inner spring.
Just use the Comp Cams kit springs- as supplied- like DV said.

Quote:
Is installing the Comp Cam springs and seals something that I can do at home with a simple valve spring compressor?
Yes, it is easily done by you if you have a spring compressor. Be sure that you check each individual spring installed height before installing the springs, and shim if needed. There should be specs for the installed height w/the springs.

Quote:
Finally, I had my block zero decked to a set of speed pro flat top pistons. I am going to be using a .039 thick head gasket and stock rocker arms, will stock length pushrods work with this setup?
Always check for the correct p-rod length. There are too many variables to say the OEM length will be correct.
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